The results of a magazine survey showed that 42 out of 80 people plan to vote for Mr. Smith for President. Which is the best prediction of the total number of votes he will receive if 2,000 people vote? A.
25

B.
50

C.
120

D.
1,050

Arandomized controlled trial is designed to evaluate the effect of metoprolol in patients with heart failure. while preparing for statistical analysis, the researcher reviews some common types of statistical errors. which of the following statements is true regarding a type i error in a clinical study? a. the study is not significantly powered to detect a true difference between study groups. bthe null hypothesis is true but is rejected in error. c. the null hypothesis is false but is accepted in error. d. type i error is also known as beta and is usually 0.1 or 0.2. e. type i error depends on the study's confidence interval.